ade4 (version 1.7-6)

mafragh: Phyto-Ecological Survey

Description

This data set gives environmental and spatial informations about species and sites.

Usage

data(mafragh)

Format

mafragh is a list of 6 components.

xy

are the coordinates of 97 sites.

flo

is a data frame with 97 sites and 56 species.

neig

is the neighbourhood graph of the 97 sites (an object of class 'neig').

env

is a data frame with 97 sites and 11 environmental variables.

partition

is a factor classifying the 97 sites in 5 classes.

area

is a data frame of class area

tre

a character providing the phylogeny as a newick object

traits

a list of data frame. Each data frame provides the value of biological traits for plant species

nb

is the neighbourhood graph of the 97 sites (an object of class 'nb').

Spatial

is a data frame of class sp

spenames

is a vector of the names of species.

References

See a data description at http://pbil.univ-lyon1.fr/R/pdf/pps053.pdf (in French).

Examples

# NOT RUN {
data(mafragh)
coa1 <- dudi.coa(mafragh$flo, scan = FALSE)
pca1 <- dudi.pca(mafragh$xy, scan = FALSE)
if(adegraphicsLoaded()) {
  g1 <- s.label(mafragh$xy, nb = mafragh$nb, psub.text = "Samples & Neighbourhood graph", 
    plot = FALSE)
  g2 <- s.value(mafragh$xy, coa1$li[, 1], psub.text = "Axis 1 - COA", plot = FALSE)
  g3 <- s.value(mafragh$xy, pca1$li[,1], psub.text = "Axis 1 - PCA", plot = FALSE)
  g4 <- s.class(pca1$li, mafragh$partition, psub.text = "Plane 1-2 - PCA", plot = FALSE)
  g5 <- s.class(coa1$li, mafragh$partition, psub.text = "Plane 1-2 - COA", plot = FALSE)
  g6 <- s.class(mafragh$xy, mafragh$partition, chullSize = 1, ellipseSize = 0, starSize = 0, 
    ppoints.cex = 0, plot = FALSE)
  G <- ADEgS(c(g1, g2, g3, g4, g5, g6), layout = c(3, 2))

} else {
  par(mfrow = c(3, 2))
  s.label(mafragh$xy, inc = FALSE, neig = mafragh$neig, sub = "Samples & Neighbourhood graph")
  s.value(mafragh$xy, coa1$li[, 1], sub = "Axis 1 - COA")
  s.value(mafragh$xy, pca1$li[,1], sub = "Axis 1 - PCA")
  s.class(pca1$li, mafragh$partition, sub = "Plane 1-2 - PCA")
  s.class(coa1$li, mafragh$partition, sub = "Plane 1-2 - COA")
  s.chull(mafragh$xy, mafragh$partition, optchull = 1)
  par(mfrow=c(1, 1))
}

# }
# NOT RUN {
link1 <- area2link(mafragh$area)
neig1 <- neig(mat01 = 1*(link1 > 0))
nb1 <- neig2nb(neig1)

if(adegraphicsLoaded()) {
  if(requireNamespace("sp", quietly = TRUE)) {
    g7 <- s.label(mafragh$xy, Sp = mafragh$Spatial, pSp.col = "white", plot = FALSE)
    g8 <- s.label(mafragh$xy, Sp = mafragh$Spatial, pSp.col = "white", nb = nb1, plab.cex = 0, 
      pnb.node.cex = 0, ppoints.cex = 0, plot = FALSE)
    G <- ADEgS(c(g7, g8), layout = c(2, 1))
  }

} else {
  par(mfrow = c(2, 1))
  area.plot(mafragh$area, center = mafragh$xy, clab = 0.75)
  area.plot(mafragh$area, center = mafragh$xy, graph = neig1)
  par(mfrow = c(1, 1))
}

if(requireNamespace("maptools", quietly = TRUE) & requireNamespace("spdep", quietly = TRUE)) {
  lw1 <- apply(link1, 1, function(x) x[x > 0])
  listw1 <- spdep::nb2listw(nb1, lw1)
  coa1 <- dudi.coa(mafragh$flo, scan = FALSE, nf = 4)
  ms1 <- multispati(coa1, listw1, scan = FALSE, nfp = 2, nfn = 0)
  summary(ms1)
  
  if(adegraphicsLoaded()) {
    if(requireNamespace("lattice", quietly = TRUE)) {
      g9 <- s1d.barchart(coa1$eig, p1d.hori = FALSE, plot = FALSE)
      g10 <- s1d.barchart(ms1$eig, p1d.hori = FALSE, plot = FALSE)
      g11 <- s.corcircle(ms1$as, plot = FALSE)
      g12 <- lattice::xyplot(ms1$li[, 1] ~ coa1$li[, 1])
      G <- ADEgS(list(g9, g10, g11, g12), layout = c(2, 2))
    }
    
  } else {    
    par(mfrow = c(2, 2))
    barplot(coa1$eig)
    barplot(ms1$eig)
    s.corcircle(ms1$as)
    plot(coa1$li[, 1], ms1$li[, 1])
    par(mfrow = c(1, 1))
  }
}
# }